birthday
//ˈbɜːθ.deɪ//
informalForms
- Plural
- birthdays
- present (v1)
- birthday
- past (v2)
- birthdayed
- past participle (v3)
- birthdayed
- present participle
- birthdaying
- 3rd person singular
- birthdays
Definitions
1.The anniversary of the day on which someone is born.
- When's your birthday? Mine's on April 1.
- I'll be thirty-seven (years old) next birthday.
- Oliver Twist's ninth birthday found him a pale thin child, somewhat diminutive in stature, and decidedly small in circumference.
2.The anniversary of the day on which something is created.
- Do you remember your father's birthday?
- Today is June 18th and it is Muiriel's birthday!
- On your birthday this year, Andrew, you are turning 28 right?
3.The date on which someone is born or something is created, more commonly called birthdate or date of birth.
- Do you remember your father's birthday?
- Today is June 18th and it is Muiriel's birthday!
- On your birthday this year, Andrew, you are turning 28 right?
4.A birthday party.
- I'd like to invite you all to my birthday.
1.To celebrate one's birthday.(informal)
Frequency
Overall
Uncommon· #2068
By learning goal
- Everyday conversation
- Uncommon
- General reading & writing
- Uncommon
- Academic
- Rare
- Literature
- Rare
Related words
Word family
Etymology
From Middle English birthdai, birtheday, from Old English ġebyrddæġ (“birthday”), influenced by Old Norse burðr, equivalent to birth + day.